YANBU. I'm expecting DC1 and won't be uploading photos onto Facebook. I have many reasons for this, but it's mainly just because I don't want images of my child to automatically become public property (there are some issues regarding my (abusive, estranged, despicable) FIL that were raised when BIL posted pics of his baby (FIL's other grandchild) online, but that's a whole other story).
Not sure how I'll feel about school assembly/sports day, etc photos being public - I will think about that when the time comes and not worry about it for now. I suspect I'll be more sanguine (and less hormonal!) about it all by then. I guess it's slightly different for me, in that it's not strangers having the photos that bothers me, rather certain unpleasant people I know. I realise that I can't always have total control over who owns images of my child, but I'd like to exercise as much control as I can, for now at least.
Of course, my Mum will take a picture of the baby and proudly display it on her desk at work, but for me, this is not the same thing, as people can't just do 'right-click, save picture as' and then do what they like with it.
To the OP, I would suggest that you don't upload photos of your DC if you don't want people to copy them, and therefore own them. You relinquish all rights to the photos the minute you've put them on your page, so just don't do it in the first place.
I know some people think I am odd, but fortunately I have never really set much store by what people think of me! I do think that people could be a bit more 'live-and-let-live' about this subject rather than making comments such as 'You might as well cover your child's face with a paper bag when you take it out in public, then' (not quoting anyone in particular there, just a general attitude I have seen on here). It's not the same thing at all, and I don't judge others for putting their photos online, so why should I be judged for my personal choice not to?